eina debug - ensure sockaddr is 0'd out before filling in to avoid junk

valgrind does complain about this. i'm not sure it matters but it's
safer to 0 it out in case some field is being used that we don't think
is being used that we didn't set.

src/lib/eina/eina_debug.c

@@ -514,6 +514,7 @@ eina_debug_local_connect(Eina_Bool is_master)
                   sizeof(curstate)) < 0)
      goto err;
    // sa that it's a unix socket and where the path is
+   memset(&socket_unix, 0, sizeof(socket_unix));
    socket_unix.sun_family = AF_UNIX;
    strncpy(socket_unix.sun_path, buf, sizeof(socket_unix.sun_path) - 1);
    socket_unix_len = LENGTH_OF_SOCKADDR_UN(&socket_unix);